CN100352629C

CN100352629C - Reciprocating saw

Info

Publication number: CN100352629C
Application number: CNB031064167A
Authority: CN
Inventors: 托马斯·J·惠勒; 特里·L·特纳; 小威廉·G·哈曼; 厄尔·凯利坎
Original assignee: Black and Decker Inc
Current assignee: Black and Decker Inc
Priority date: 2002-01-02
Filing date: 2003-01-02
Publication date: 2007-12-05
Anticipated expiration: 2023-01-02
Also published as: US20040143976A1; EP1325790A2; CA2415452C; CA2415452A1; US20030121389A1; EP1325790A3; CN1429693A; NZ532553A; NZ523397A; US20120272799A1; US7506447B2

Abstract

A reciprocating saw includes a carrier operable to cooperate with a motor to translate rotational movement of the motor into reciprocal linear actuation of a saw blade. A carrier is slidably disposed within the housing and includes a first portion adapted to receive a saw blade and a second portion having a slot therethrough. A rotatable element is fixed for rotation about an output shaft of the motor. A follower operably interconnects the carrier and the rotatable element wherein rotation of the rotatable element provides reciprocal linear motion of the carrier whereby the follower follows a reciprocal linear path within the slot.

Description

Reciprocating saw

Technical field

The present invention relates to reciprocating saw, more particularly, the present invention relates to a kind of reciprocating saw that rotatablely moving of power source can be changed into the linear reciprocation action of saw blade.

Background technology

In industrial circle, carpenter and builder had adopted reciprocating saw and scroll saw to finish various cutting operations already.Traditional reciprocating saw or scroll saw generally include one and have the housing of motor, a reciprocating transmission mechanism and a saw blade that removably is connected on the driving shaft that is used for rotatablely moving of motor changed into support or driving shaft.Yet these traditional structures exist some defectives, and these defectives have lowered the availability and the service life of instrument.For example, in cutting operation, wood chip that produces from workpiece or fragment accumulate in easily with saw blade be clamped to clamping device on the instrument around.In addition, in some cases, chip also may be inhaled in the transmission mechanism of saw blade.Therefore just be desirable to provide a kind of saw, it can produce a malleation on the surface of saw blade and clamping device, to stop accumulation of debris at above-mentioned zone or enter into transmission mechanism.

In addition, traditional reciprocating saw generally includes a Handheld Division of extending with 180 ° of angles, and scroll saw then has a Handheld Division of extending with 90 ° of angles usually.Yet,, provide one will be more useful greater than the 90 ° of angles and the Handheld Division of extending less than 180 ° of angles in order in the use of scroll saw and reciprocating saw, more cosily to control an instrument.

Although for the various potential functions of reciprocating saw, the traditional transmission device that is installed in the reciprocating saw is gratifying, but still wishes to propose a kind of simpler and durable upgrading products, and it has possessed the ideal functionality that surmounts prior art.

Summary of the invention

Overall purpose of the present invention is that a kind of reciprocating saw will be provided, and it comprises a support that cooperates with the power source operation, rotatablely moving of power source changed into the linear reciprocation action of saw blade.

In a kind of form of the present invention, a kind of reciprocating saw is provided, it comprises: the housing that motor is housed; A support is slidingly arranged in the described housing, and this support comprises the first that is used for holding saw blade and has the second portion that runs through groove; Also be provided with a tumbler, make it round the output shaft of motor and rotate; A follower is operatively connected to support and tumbler; The rotation of this tumbler provides the linear reciprocating motion of support, thus follower in the described groove reciprocating linear path and move.

In another kind of form of the present invention, a kind of reciprocating saw is provided, it comprises a housing that motor is housed; This reciprocating saw also comprises saw blade, and saw blade has cutting edge, mounting edge and side surface, and described side surface has been determined first plane; The support element that this reciprocating saw comprised has first, and described first comprises a base of determining second plane, and this base is fit to be used for holding saw blade, makes described first plane parallel in second plane; Support also comprises the second portion that links to each other with motor, and second portion comprises the groove of a definite path of navigation; Also be provided with a tumbler, it is rotated round the output shaft that stretches out from motor; A follower is operatively connected to support and tumbler; The rotation of this tumbler provides the linear reciprocating motion of support, thus follower in the path of navigation reciprocating linear path and move.

In another form of the present invention, a kind of reciprocating saw is provided, it comprises a housing that motor is housed; Saw blade comprises cutting part and afterbody; This reciprocating saw also comprises a support, and support comprises the first and the second portion that links to each other with motor that is used for holding saw blade, and first comprises pair of sidewalls and the base that extends between this oppose side wall; A hold assembly stretches out from sidewall, and this hold assembly is meshed with saw blade in boundary edge, remains on the afterbody with saw blade in the first of support; A cam member extends between two sidewalls, and this cam member is arranged to leave the base of support, forms a gap that holds saw blade with this, and this cam member is near that part of between edge, boundary on the saw blade and the cutting part.

In another form of the present invention, a kind of reciprocating saw is provided, it comprises a housing that motor is housed; A support is slidingly arranged in the described housing, and this support comprises the first and the second portion that links to each other with motor that is used for holding saw blade; Fan is arranged in the Handheld Division of housing and is arranged to force air flow stream to cross the second portion of support, and air-flow flows to the first of support from the second portion of support, produces sealing function, enters into this instrument to prevent wood chip and other chip.

In another form of the present invention, a kind of reciprocating saw is provided, it comprises a housing and a motor; Housing comprises a main bearing, and main bearing has and the contacted plane of workpiece, and main bearing also is included as the opening that saw blade provides passage; In addition, main bearing also comprises from the outward extending first pair of siding track of the two opposite sides of this bearing; The secondary bearing that is provided comprises second pair of siding track, and second pair of siding track is arranged to slide with first pair of siding track and meshed, so that optionally be installed on the main bearing; Secondary bearing provides bigger (workpiece joint) plane, the stability when cutting to increase.

By following detailed description, other application of the present invention will become more obvious.Should be appreciated that detailed description of having done and described specific embodiment just are used for illustrative purposes, are in no way meant to be limiting for the scope of the invention when explanation the preferred embodiments of the present invention.

Description of drawings

By detailed description and accompanying drawing hereinafter, will have more fully the present invention and understand, wherein:

Fig. 1 is the stereogram of reciprocating saw of the present invention;

Fig. 2 is the cutaway view of reciprocating saw;

Fig. 3 is the stereogram of the support that removes from reciprocating saw;

Fig. 4 is the cutaway view of 4-4 line in Fig. 2 of reciprocating saw;

Fig. 5 A～5D is support and the partial sectional view of transmission component when a complete circle of experience output gear rotates;

Fig. 6 is the rear side stereogram of reciprocating saw, has represented to connect the secondary bearing on it;

Fig. 7 is the stereogram of reciprocating saw, has removed secondary bearing among the figure, so that the siding track of main bearing to be shown;

Fig. 8 is the stereogram of secondary bearing.

The specific embodiment

Below description that preferred embodiment is done, with regard to its character, just be used for for example, be absolutely not to be used for to the present invention and its enforcement and to use and limited.

At first, there is shown reciprocating saw of the present invention, and identify with number designation 10 usually referring to Fig. 1 and Fig. 2.Reciprocating saw 10 comprises a motor 12 that is arranged in the housing 14.Reciprocating saw 10 is configured to start saw blade 20.Housing 14 comprises one with respect to the Handheld Division 94 of saw blade 20 to extend greater than 90 ° angle.Preferably extend with 105 °～125 ° angle this Handheld Division 94, so that can more cosily control this instrument in the use of scroll saw and reciprocating saw.

Continuation, will be explained in detail the maintaining body 46 of saw blade in addition again referring to Fig. 3 and Fig. 4 below referring to Fig. 2.Support (perhaps being called axle) 16 makes saw blade 20 actions.Support 16 is contained in the housing 14.Support 16 has the first 24 that is holding saw blade 20, and the second portion 26 that is driven by driven unit 30.The first 24 of support 16 comprises saw

blade maintaining body

46, and 46 of saw blade maintaining bodies have the sort of base 42 described in cam mechanism 28 and the unexamined patent application " saw blade clamping device ", and this application is hereby incorporated by reference.Cam mechanism 28 comprises: have the rocking arm 32 of arm end 34, central pivot portion 36, and bare terminal end 38.Central pivot portion 36 can hold a bolster 40.Rocking arm 32 rotates round bolster 40.Press arm end 34 by the button 108 that is installed on the housing 14.

Rocking arm 32 is subjected to the bias voltage of clockwise direction (arrow C direction among Fig. 4), thereby bare terminal end 38 acts on saw blade 20.Spring 44 comprises the spring terminal 48 on first and

second sidewalls

56,58 that are fixedly connected to base 42.The middle hoop 50 of spring 44 can match with the upper surface 54 of rocking arm 32, so that biasing force to be provided.

First and

second sidewalls

56,58 extend vertically upward from the bottom surface 60 of base 42, to determine a passage 62.In order to slide,

sidewall

56,58 is supported by the ball bearing on the guide platform 164 that is arranged at housing 14 64,66 in opposite both sides.The position of ball bearing 64,66 is preferably near the contact point of rocking arm 32 with saw blade 20, to reduce the moment of torsion that acts in the operating process on support 16 and the saw blade 20.Along the length direction of the saw blade 20 of support 16 clampings, the exterior contour in support 16 cross sections remains unchanged basically.This makes ball bearing 64,66 56,58 to roll reposefully surfacewise.Simultaneously, ball bearing 64,66 is remaining and is being close to the cutting biasing force that produces in the cutting, and this makes the bearing load

minimum.Guiding bead

84,86 is held ball bearing 64,66, makes bearing 64,66 can closely cut biasing force.

First and

second sidewalls

56,58 comprise first or second spring mounting hole 70,72 respectively.Installing hole 70,72 is fixed spring terminal 48.Similarly, bolster 40 is contained in the through hole 74,76 that is arranged at respectively on the sidewall 56,58.The end 80,82 of first and

second sidewalls

56,58 outwards is shaped, and produces the first and second guiding beads 84,86.A cam member (or pin) 60 extends between two side 56,58.Pin 90 fractures in support 16 when working to prevent saw blade for saw blade 20 provides aiding support.The effect of guiding

bead

84,86 is to help saw blade 20 is directed in the passage 62.The bottom surface 60 of base 42 comprises a stop 92, it with an angle towards cam mechanism 28.

Referring now to all accompanying drawings, the operation of maintaining body 46 is described.For saw blade 20 is installed in the maintaining body 46, at first saw blade 20 is inserted in the passage 62, be posted by the contact-making surface that is angle 68 of stop 92 up to the outer rim 52 of saw blade 20.Therefore, saw blade 20 main bodys (major opposing side in other words) 22 are directed two planes 22,60 are parallel to each other (or claiming side by side).So cut when wearing workpiece when saw blade 20, the entity width of support 16 and saw blade 20 is on line of cut.This has increased the intensity of saw blade when operation.

The afterbody 78 of saw blade 20 (Fig. 5 A) is inserted between stop 92 and the first side wall 56, so that saw blade 20 is more stable.The side 98 of stop 92 provides the biasing force to saw blade 20 afterbodys 78 sides.In case after saw blade 20 inserted fully, spring 44 was pressed in bare terminal end 38 on the hole wall 18 of saw blade 20.The surface 68 that the effect of power makes surface 52 be posted by stop 92 is to be fixed to saw blade 20 in the saw blade maintaining body 46.The projection effect of stop 92 is pressed in saw blade 20 downwards on the base 42, and sideshake is reduced to minimum, makes cutting more accurately with efficient.In order to unload saw blade 20, press button 108 on the lower house 14 facing to the arm end 34 of rocking arm 32, so that bare terminal end 38 is from hole wall 18 disengagements of saw blade 20.

The second portion 26 of support 16 comprises from continue the outer rim 100 of extension around first and

second sidewalls

56,58 of first's 24 peripheries.Equally, the base 42 of first 24 also extends in the second portion 26 and is the boundary with outer rim 100.Groove 102 is formed in the base 42.Groove 102 is by beginning the first couple of extending and 104,106 formations of second pair of cross wall from groove 102 two opposite edges edge respectively.Cross wall 104,106 is determined a path of navigation 110.Groove 102 also comprises the relative passage 114,116 that is formed on support 16 bases 42.Passage 114,116 is formed between first pair and the second pair of cross wall 104,106.Such as will be described in detail, relative passage 114,116 is constructed to be permeable to hold gear support axle 120.Groove 122,124 has constituted the opposite two ends of path of navigation 110.

Get back to Fig. 2～Fig. 4, further describe driven unit 30.Driven unit 30 is at first by being started from housing 14 extended triggers 96.Motor 12 comprises driven wheel 88, and it has keyway to rotate output gear 124.Driven unit 30 also comprises gear support axle 120, and its opposite two ends are by bearing 140,142 supportings.Reduce the noise and the wearing and tearing of gear by the supporting of axle 120 opposite end.Output gear 124 is arranged on the bolster 120.The output shaft 130 of a biasing is connected in output gear 124.Output shaft 130 has constituted (doing orbital motion) track driving shaft 130.A follower 134 is rotationally connected with the output shaft 130 of biasing.Follower 134 comprises roller 136 and is contained in sliding part 138 in the path of navigation 110 of groove 102.So follower 134 has facilitated roller 136 along being rotatably assorted of corresponding cross wall 104,106 surfaces along moving of path of navigation 110 simultaneously, and sliding part 138 being slidingly matched along corresponding cross wall 104,106 surfaces.Employing is by the advantage of the follower 134 that roller 136 and sliding part 138 constitute, and can reduce the noise and the wearing and tearing of gear, can reduce the loss of output shaft 130 simultaneously.

Referring to Fig. 5 A～5D, in when operation, support 16 produces and descend linear reciprocating motion on the whole shown in arrow A among the figure.Fig. 5 A has represented that follower 134 is in its center of top dead point with respect to groove 102; Fig. 5 B has represented that follower 134 is in its abundant extending level position of 90 °; Fig. 5 C has represented that follower 134 is in its bottom center dead point of 180 °; Fig. 5 D has represented that follower 134 is in its abundant extending level position of 270 °.

The rotation of driven wheel 88 is passed to follower 134 by output gear 124 and the track driving shaft 130 that is attached thereto.The rotation of output gear 124 is represented with arrow B.Groove 102 in the support 16 with the vertical component of the circular motion track of track driving shaft 130, change the rectilinear motion up and down of support 16 into.The horizontal component of circular motion track is extended is track driving shaft 130 moving along path of navigation 110 directions.When follower 134 transforms the horizontal component of its circular motion track, be integrally formed at two opposite on the support 16 passages 114,116 passage that holds gear support axle 120 (Fig. 5 A and Fig. 5 C) is provided.Thereby sliding part 138 has the width W of extending along path of navigation 110 directions, and it is greater than the width X of passage 114,116.This relation makes follower 134 reducing to minimum through 114,116 o'clock the loss of momentum of passage, provides the easy motion of along continuous straight runs with this.In addition, roller 136 has improved follower 134 reciprocating efficient, and this is because main motion is to be finished by the rolling that roller 136 carries out on cross wall 104,106.

Referring to Fig. 2 and Fig. 3, reciprocating saw 10 comprises a fan 17 that is arranged in the Handheld Division 94, and its direction makes air-flow walk around the second portion 26 that motor 12 arrives support 16.Fan 17 is set provides cooling, and stop accumulation of debris around cam mechanism 28 and driven unit 30 for motor 12.Part gas is discharged from housing 14 by the steam vent 150 that is arranged on housing 14 both sides.Remaining air-flow is directed to first 24 from the passage 62 of second portion 26 by support 16.Its effect of air-flow of flowing through passage 62 is as a kind of seal, to have stoped wood chip and other accumulation of debris around maintaining body 46.The residual gas stream of passage 62 of flowing through is disposed the chip on saw blade 20 and the surface of the work, and this has improved operation and has observed property.Air-flow also produces malleation around the second portion of support 16, to stop accumulation of debris around driven unit 30.

Referring to Fig. 6～Fig. 8, reciprocating saw 10 comprises main bearing 144 and secondary bearing 154.Main bearing 144 comprises junction surface (heal) 146 and siding track 148, and siding track 148 extends on opposite both sides of the edge, the stability so that operation to be provided.Secondary bearing 154 comprises the second pair of siding track 156 that extends internally from outer wall 158.Secondary bearing 154 can optionally be installed on the main bearing 144, so that (when engaging with workpiece) bigger surface area and operational stability to be provided.Lock bolt 160 is installed on the main bearing 144, by it secondary bearing 154 is connected on the main bearing 144 with a kind of engagement.The button 162 of lock bolt 160 is configured to stretch out from the opening 166 of housing 14, but improves contact with this.Make lock bolt 160 in tool assembly, keep inactive state by one (unshowned) compression spring.This spring is along the axis generation effect of self, and the one end acts on the sidewall 174 of button 162, and its opposite other end acts on (unshowned) inwall of main bearing 144, and this impels lock bolt 160 to be meshed with the wall 182 that contacts of stop 172.

For secondary bearing 154 is installed on the main bearing 144, first pair of siding track 148 on the main bearing 144 aimed at mutually with second pair of siding track 156 on the secondary bearing 154.By entering, secondary bearing 154 is moved forward along the direction that the axis with siding track 156 parallels the button 162 of lock bolt 160, engage with the wall 176 of main bearing 144 up to the wall 172 of the stop 170 that stretches out from secondary bearing 154.Button 162 with lock bolt 160 discharges then, makes the arm 178 of lock bolt 160 enter into the passage 184 of stop 170.Arm 178 has been guaranteed secondary bearing 154 locks in place with the engagement of stop recess 182.

Although in specification and accompanying drawing, the present invention is described and shows with the form of preferred embodiment, but those skilled in the art will understand, in defined scope of the present invention, can make various variations and replace each element in the invention with various equivalents by claims.That is to say that the present invention is not limited to is described and shown in the drawings by specification, it seems it is the specific embodiment of implementing this invention optimised form at present, but the present invention all forms of implementation in the appended claims scope have been comprised.

Claims

1. a reciprocating saw (10), it comprises:

The housing (14) that motor (12) are housed;

A support (16) is slidingly arranged in the described housing, and this support comprises first (24) and second portion (26), and first has the passage (62) that is used for holding saw blade (20), and second portion has the groove (102) that runs through;

A rotatable part, it fixedly makes it round the output shaft (1 30) of described motor (1 2) and rotate;

A follower (134), be operatively connected to described support (16) and tumbler, wherein the rotation of this tumbler provides the linear reciprocating motion of described support (16), thus described follower (134) in the described groove (102) reciprocating linear path and move; And

Described groove (102) comprises the sidewall that extends from its opposed edges, described sidewall comprises first pair and second pair of transverse wall, by being formed in first passage (114) and the second channel (116) in the described support, the described second pair of transverse wall of described first pair of transverse wall (104) lateral run-out (106).

2. reciprocating saw as claimed in claim 1, wherein, described passage (114,116) be orientated when follower (134) in described groove (102) reciprocating linear path and when moving, make output shaft extend through this passage.

3. reciprocating saw as claimed in claim 2, wherein, described follower (134) comprises a sliding part (138), it is along width of first direction horizontal expansion, thereby is assemblied in slidably between relative described first pair and the second pair of transverse wall; Described sliding part also extends a width along second direction, and this width is greater than described width of channel.

4. reciprocating saw as claimed in claim 3, wherein, described follower (134) also comprises the roller (136) that links to each other with described sliding part (138), described roller (136) be configured to when follower (134) in described groove reciprocating linear path and when moving, roller (136) is rotated with described transverse wall contacts.

5. reciprocating saw as claimed in claim 4, wherein, described housing also comprises a fan (17), the air flow stream that makes that it can be operated is crossed the first (24) that the second portion of described support (16) (26) arrives support (16).

6. reciprocating saw as claimed in claim 5, wherein, the steam vent (150) that described fan (17) can also make air communication cross to be configured on the housing and flow out described housing.

7. reciprocating saw as claimed in claim 1, wherein, this reciprocating saw also comprises the base portion (42) of installing with removably, and described base portion (42) comprises from self extended first pair of siding track (148), is used for being slidingly matched with the second pair of siding track (156) that is arranged on the described housing.

8. reciprocating saw as claimed in claim 7, wherein, one of them also comprises a lock bolt (160) described housing (14) and described base (42), is used for optionally described base being connected in described housing.

9. a reciprocating saw (10), it comprises:

The housing (14) that motor (12) are housed;

Saw blade (20) with cutting edge, mounting edge and side surface, described side surface has been determined first plane;

A support element (16) has first (24), and described first comprises a base (42) of having determined second plane, and this base is fit to be used for holding saw blade, and wherein said first plane parallel is in described second plane; Described support element (16) also comprises the second portion (26) that links to each other with motor (12), described second portion comprise one determined path of navigation run through groove (102), described groove (102) comprises the sidewall that extends from its opposed edges, described sidewall comprises first pair and second pair of transverse wall, by being formed in first passage (114) and the second channel (116) in the described support, the described second pair of transverse wall of described first pair of transverse wall (104) lateral run-out (106);

A rotatable part, it fixedly makes it rotate round the output shaft that stretches out from motor (130); A follower (134) is operatively connected to described support (16) and tumbler; Wherein the rotation of this tumbler provides the linear reciprocating motion of described support (16), thus described follower (134) in the described path of navigation reciprocating linear path and move.

10. reciprocating saw as claimed in claim 9, wherein, described passage (114,116) be orientated when follower (134) in described groove (102) reciprocating linear path and when moving, make output shaft extend through this passage.

11. reciprocating saw as claimed in claim 9, wherein, described follower (134) comprises a sliding part (138) that connects rotationally on it, described sliding part (138) is along the first direction horizontal expansion and determined a width, thereby is assemblied in slidably between relative described first pair and the second pair of transverse wall; Described sliding part also extends a width along second direction, and this width is greater than described width of channel.

12. reciprocating saw as claimed in claim 11, wherein, described follower (134) also comprises the roller (136) that links to each other with described sliding part, described roller be configured to when follower in described path of navigation reciprocating linear path and when moving, roller is rotated with described sidewall contacts.

13. reciprocating saw as claimed in claim 9, wherein, described housing also comprises a fan (17), and the air flow stream that makes that it can be operated is crossed the first (24) that the second portion of described support (16) (26) arrives support.

14. reciprocating saw as claimed in claim 13, wherein, the steam vent (150) that described fan (17) can also make air communication cross to be configured on the housing and flow out described housing.

15. reciprocating saw as claimed in claim 9, wherein, described reciprocating saw also comprises a dismountable base (42), and described dismountable base (42) comprises from self extended first pair of siding track (148), is used for being slidingly matched with the second pair of siding track (156) that is arranged on the described housing.

16. reciprocating saw as claimed in claim 15, wherein, one of them also comprises a lock bolt (160) described housing (14) and dismountable base (42), is used for optionally described dismountable base being connected in described housing.

17. a reciprocating saw (10), it comprises:

The housing (14) that motor (12) are housed;

Saw blade with cutting part and afterbody;

A support (16), described support comprise first (24) that is used for holding saw blade and the second portion (26) that links to each other with described motor, the base (42) that described first comprises pair of sidewalls (56,58) and extends between this oppose side wall;

A hold assembly stretches out from described sidewall, and this hold assembly operatively is meshed with saw blade in boundary edge, remains on the afterbody with saw blade in the first of described support;

A cam member (60) extends between described two sidewalls (56,58), and described cam member is arranged to leave base portion, forms a passage (62) that holds described saw blade; Extend that part of vicinity of described cam member between edge, boundary on the saw blade and cutting part.

18. a reciprocating saw (10), it comprises:

The housing (14) that motor (12) are housed;

A transmission mechanism that is connected in described motor;

A support (16) that is arranged in the described housing and saw blade and described transmission mechanism can be operatively connected is so that change the rotation of described motor into the linearly operating of described saw blade;

A detachable base portion (42) of installing, described base portion comprise from self extended first pair of siding track (148), are used for being slidingly matched with the second pair of siding track (156) that is arranged on the described housing; One of them also comprises a lock bolt (160) described housing and base, is used for optionally described base being connected in described housing.

19. reciprocating saw as claimed in claim 18, wherein, described lock bolt (160) be biased into from the position of engagement that the extended stop of described base (92) leans.

20. reciprocating saw as claimed in claim 19, wherein, described lock bolt (160) can move between the position of engagement and disengaged position.